Greenlee Super Tugger 6000 Serie Manual De Instrucciones página 15

Cable Pulling Principles (cont'd)
Cable Pulling Forces (cont'd)
At the Sheaves
Sheaves are used to change the direction of the pull.
A change in direction creates a new resultant force
that may be greater than the cable puller's maximum
pulling force. This new resultant force exerts itself on the
sheaves, sheave anchoring system, and support struc-
tures illustrated.
The resultant amount of force depends on the angle of
the change in direction. A brief table is provided here;
for more details, see IM 1363 (99929988).
Greenlee / A Textron Company
6000-Series Super Tugger
Resultant Force Table for the Super Tugger
(28.9 kN or 6500 lb Maximum Pulling Force)
Illustration
135°
Resultant Force =
22.3 kN (5005 lb)
Typical Resultant Force at Sheave
15
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Cable Pullers
®
Angle of Change
in Direction
180°
150° 15 (3380)
135° 22.3 (5005)
120° 28.9 (6500)
90° 40.8 (9165)
60° 50.0 (11,245)
45° 53.5 (12,025)
30° 55.8 (12,545)
0° 57.8 (13,000)
R
0 (0)